Process of producing isoprene.



ran era rne rarnnr can enone mnnnme Ann HUGO Kimmie, or ELBERFELD, GERMANY, assrenons 're rnnnnnrannmnn vomn. manna. BAYER & 00., or ELIBEBFELD, GERMANY, a

CORPORATION OF GERMANY.

PROCESS OF PRODUCING- ISOPBENE.

Ito Drawing. I

Specification'of Letters Patent.

Application filed February 20, 1911. Serial No. 609,565.

lPatentedMayQl, rate.

To all whom it may 6mm.-

Be it known that we, Gnonc MERLING and HUGO Korrnnn, doctors of philosophy, chem- 2 0 the halogenated product thus obtained wit an agent, suchas quinolin, alcoholic alkali,

' etc., which is capable of splitting ofi .halogenhydrid.

Ihe isopropenylmethyl'carbinol can be obtained by heating theammonium base obtained from 3-methyl-2-oxy-butyldimethylamin:

cm-on-cn-curl l gg on err, on p in order to illustrate the new process more fully the following example is given, the parts being by we1 ht:2.5 parts of hosphorous pentacblorid finely pulve are gradually introduced while being cooled and stirred into 1 part of isopropenylmethylcarbinol. The separated brownish oil is then poured on a surplus of soda solution cooled with ice. maining (after the phosphorous oxychlorid has been' decomposed) in an insoluble state, is heated in a reflux condenser with alcoholic alkali and the isoprene escaping therefrom is condensed in a tube cooled with ice and is purified by a fractional distillation.

We cla1m:'

'1; The herein described process'for producing isoprene, which process consists in at first replacing the hydroxyl of isopropenylmethylcarbinol by a halo en and then treating the halogenated pr uctthus obtained with an agent which 15 capable of splitting oil' halogen hydrid, substantially as described.

2. The herein described process for producing isoprene, which process consists in at first replacing the hydroxyl of isopropenylmethylcarbinol by chlorin and then treating the chlorinated product thus obtained with alcoholic alkali, substantially as described.

In testimony whereof we have hereunto set, our hands in the presence of two subscribing witnesses.

. v GEORG MERLING. [1 a] 'nnconorn nn; 1,. 8.] Witnesses:

Cr-ms. J. Wruen'r, ALFRED HnNKnL.

Subsequently theheavy oil re. 

